640. hadíth
وَقَالَ عَلَيْهِ اَلسَّلاَمُ: «إِنَّمَا مَثَلُ اَلصَّلاَةِ فِيكُمْ كَمَثَلِ اَلسَّرِيِّ وَ هُوَ اَلنَّهَرُ عَلَى بَابِ أَحَدِكُمْ يَخْرُجُ إِلَيْهِ فِي اَلْيَوْمِ وَ اَللَّيْلَةِ يَغْتَسِلُ مِنْهُ خَمْسَ مَرَّاتٍ فَلَمْ يَبْقَ اَلدَّرَنُ مَعَ اَلْغُسْلِ خَمْسَ مَرَّاتٍ وَ لَمْ تَبْقَ اَلذُّنُوبُ مَعَ اَلصَّلاَةِ خَمْسَ مَرَّاتٍ.
Imam (a.s) said: "The example of prayer among you is like that of a stream (sari), a river at the door of one of you, into which he bathes five times a day. No dirt remains with bathing five times, and similarly, no sins remain with the five daily prayers."